Assembly of ring binders and resulting product

Details Assembly of ring binders and resulting product Assembly of ring binders and resulting product

1985-04-12

1986-04-15

Bell, Paul A.

Binder device releasably engaging aperture or notch of sheet

Depository

Face member with back member

402 80P, 281 1, 281 29, B42F 1300, B42D 318, B42D 300

Patent

active

045824428

ABSTRACT:
An elongated hollow rectangular spine or backplate formed of plastic material for supporting and securing ring hardware in a loose-leaf binder has spaced, parallel, front and back walls joined at the edges and a centrally disposed strengthening rib extending between the front and back walls longitudinally for the length of the backplate. The ring hardware is secured to the backplate by inserting plastic rivets through apertures in the ring hardware aligned with counterbored holes in the backplate rib and sonically welding the rivet therein. The rivets and counterbored holes of the backplate rib facilitate the welding operation.

REFERENCES:
patent: 2632657 (1963-03-01), Schade
patent: 2772427 (1956-12-01), Rankin
patent: 2947309 (1960-08-01), Bennett
patent: 3175847 (1965-03-01), McKowen
patent: 3201145 (1965-08-01), Libby
patent: 3262454 (1966-07-01), Shillinger
patent: 3572957 (1971-03-01), Strassberg
patent: 3809485 (1974-05-01), Beyer
patent: 4295747 (1981-10-01), Errichiello

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